There are 14 data sets (7 beams times two polarization's). They have been
offsets for display.

The horizontal access is sample number. There are 18 strips * 600 samples
per strip

The signal was on nearly continuously for the first five strips. It reoccurred
near sample 6500 and 9000 (but only for a short duration).

Center. This is the power computed over the 4 Mhz baseline (excluding gps
and the 1380 birdie). It shows that there were no jumps in gain/power.
The increases in the top plot are coming from the gps signal.

Bottom: This is the same plot as the top one except that it is plotted
versus AST time rather than sample number. The continuous interference
was over by 20:30 AST.

11 seconds of data from beam0a have been averaged. The data is centered
on second 565 of the dynamic spectra (where GPS L3 was strong and the striations
were visible).

The small bump at 1380.1 is the 1350 faa harmonic.

Vertical dashed lines are shown every 120 Khz. They are close to the striations
in the image. This would correspond to a time modulation of 1/120e3 = 8.3
useconds. I'm not sure whether this is part of the GPS L3 modulation
scheme or not.